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R. A. SCHOENBERG (NOW BY JUDICIAL CHANGE OF NAME R. Al BELMONT). PULL socKET. l APPLICATION FILED APR-28| I9I6.

Patented Oct. 11, 1921.

UNIE

'raient OFFICE- `RALPH A. sCiiorNBERe, Now EY senioren CHANGE or NAME, RALPH A. BELMONT, 0E NEW YORK, N. Y., AssiGNoR To BEAVER MACHINE AND TOOL Co., INC., op NEWARK, NEW JERsEY, A CORPORATION OE NEW JERsEY. c r

PULLSOCKET.

Specification of Letters Patent.

Patented Oct. 11, 1921.

Application ilcd April 2S, 191%. Serial No. 94,141.

To @ZZ whom if may concern;

Be it known that 1, RALPH A. SCi-ioiriv- Enr-.ea now by judicial change of naine, RALPH A. BELMONT7 of New York city, in the county and State of New York'. have invented a new and useful Pull-Socket, of which the following is a specification.

rlie main object of my invention is to improve and simplify puil sockets of the quick make and quick break type.

One feature of my invention consists in doing away with a number of springs heretofore used.

Another feature consists in a peculiar spring which is arranged to give a quick snap.

Another feature is that-both stationary contacts and the rotating shaft are on one i member of the body.

A.of two teiescoping sections 1 and 2 secured v` at the inner end of a screw shell contact 9 Another feature is a double one piece spring held at its center by a shaft.

Another feature is a shaft provided with integral key ears and also insulated from the center of the rotary spring.

@ther features will be pointedout belov. 1n the drawings:

tion of a device embodying` my invention;

Fig. 2 is a partial longitudinal sectional view;

Fig. 3J is a section on line 3 3 ot Fig. 2;

Fig. 4 isa section Online4`4 of Fig. 2; Fig. 5 is a section line 5 5 of Fig. 2; and

Fig. 6 is a sectional detail. n

My improved pull chain socket comprises 4a body of porcelain or theA like on or within which the terminals and switch mechanism `are mounted, said body being herein shown as coniined within a metallic shell made up together', in any suitable fashion.' As usual I have provided the shell 1-2 with a lining l 3 of iibei or other suitable non-conducting material. .v

The Aporcelain vbody Just referred to is herein shown as substantially cylindrical in `torna and as made up of two substantially semi-cylindrical sections 4 and 5 fastened together by two screws 6 and7, said sections being recessed at their lower ends to receive andv interlock with the cross-bar 8 adapted to receive a lamp, attachment plug or the like.

The threaded end of the screw 6 engages the shank 10 of -a center Contact 11 adapted to engage the center contact of the lamp or the like, said shank being held by said screw within a recess 19 provided uponthe the exterior of body section 4 and being provided with a binding screw 13 by means or" which one of the lead wires of a circuit may be fastened to said shank.

rlhe switch mechanism of my improved socket comprises a rotating bridging contact 14 made from a single piece of spring metal and comprising two resilient arms 15, 15 connected by a cross-*bar 16, the latter being fastened near its middle to the upper end of a shaft 17 rotatably coniined between the two sections of the porcelain body 4-5. As herein shown the upper end oi shaft 17 is 'forked and the cross-bar is clampedbetween the tines of this fork with a jacket 18 or" insulating material surrounding said bar and insulating it from the shaft.

T he resilient arms 15 of the rotating bridging contact 14 cooperate with two stationary contacts 19 and 2O each of which is curved eccentrically with relation to the axis Y of the rotating bridging Contact 14 and disposed so that the lower end thereof, viz.,

Vthe end 0i the stationary contact that is shoulders or steps prevent reverse movementof arms 15 and also provide for a quick and effective break when said arms ride off-"from the' high ends of the station aryl contacts. vThat is. these steps or shoulders 21 permit the resilient arms 15 to snap :j

`radially outward away roin contacts 19 and 2O as they leave thelatter, it being clear that as the arms 15 traverse thecontacts 19 and 2O they are deflected by the latter close in toward shaft 17 owing to the eccentricity of said contacts so that they are under more than normal stress or tension when they reach the high ends of contacts 19 and 20.

lThe bridging contact 14 and stationary contacts 19 and 20 are arranged within a chamber 22 provided within' body 4 5 near the upper end thereof, and those portions of the side wall of said chamber located between the end of contacts 19 and 2O which are engaged by arms 15 whilethe latter are traveling fr'om one contact to the other, are preferably also eccentrically curved or disposed with relation to thepaxis of bridging contact 14 so as to provide steps or shoulders 23 adjacent the approach ends of contacts 19 and 20 off from which the arms 15 snap onto said contacts so as to provide a quick make as well as to prevent the bridging contact 14 being reversely rotated out of engagement with said contacts. Thus the steps or shoulders 21 provide for a quick break of the circuit and prevent the bridging contact being reversely rotated into engagement with contacts 19 and 20, while steps or shoulders 23 provide for a quick make of the circuit and prevent the bridging contact being reversely rotated out of engagement with contacts r19 and 20.

Stationary contact 19 is made with a shank 24 disposed between the two body sections 4 and 5 and this shank is fastened to section 5 by a screw 25 which also fastens one end of a conductor 26 to said section. The opposite end of conductor 26 is held in place on section 5 by s-crew 7 whose threaded end engages a binding screw plate 27 and holds the latter in place on the exterior of section 4. Plate 27 carries a binding screw 28 by means of which the other lead wire (not shown) may be secured to said plate. The other stationtry contact 20 is made with a shank 29 extending lengthwise of the body between sections 4 and 5 and having its lower end soldered or otherwise secured to the cross-bar 8 of screw shell 9. lt will thus Abe clear that when the circuit is closed by the rotating bridging contact 14 it is traced from one lead wire through center contact 11-to one terminal of the device with which .the socketis Iconnected and from the other terminal of said device through screw shell 9, shank 29, contact 20, bridging contact 14, contact 19, shank 24, screw 25, conductor 26, screw 7 and plate 27 to the other lead wire.

From the chamber 22 the shaft 17 extends ,lengthwise vof the socket through a second chamber30 having at one side thereof an opening or passage 31 formed 1n section 5 and within which is secured a metallic guide tube or bell mouth 32for a ball chain 33 disk 35- is fastened one end of a spring 36 whose opposite end -is anchored within the Joint between the two body sections 4 and 5 as indicated at 37. This spring 36 normally ypositions disk 35 so that the inner end of chain 33 partly encircles shaft 17 and by pulling upon the outer end of rsaid chain the disk will be rotated in one direction and when the pull on said chain is relieved the spring will rotate the disk in the opposite direction back to its normal position again. Between the disk 35 and the bottom wall 38 of chamber 30 is arranged a metallic washer 39 through which shaft 17 loosely extends and which provides a smooth seat for rotatably supporting disk 35.

That portion of ball chain 33 which extends around shaft 17 is in engagement with the periphery of a toothed ratchet wheel 40 that is keyed to said shaft by means of two integral fins 41 engaging notches 42 in wheel 40 and when the outer end of the chain is pulled upon the latter is drawn tightly against ratchet wheel 40 and as it moves outward the engagement of its balls with the teeth of said wheel causes the latter to be rotated in the direction of the arrow, Fig. 4. When the chain is released the spring 36, acting through disk 357 pulls the chain back into chamber 30 but at this time the chain is not under tension and therefore its balls slip idly past the teeth of ratchet wheel 40, the shoulders 21 preventing backward movement of the ratchet wheel. rllhe parts are so con sti-noted and arranged that each time the chain is pulled outwardly to the limit of its movement shaft 17 is moved one quarter of a revolution and it will therefore be clear that alternate step movements of shaft 17 will bring contact 14 into circuit closing position andthe other step movements into circuit openingposition.

rFhe shaft 43 carrying bridging contact 14 is mounted entirely within sockets 43 provided upon the inner face of section 5, the inner face of section 4 extending across these sockets as indicated in Fig. 4 so as to hold said shaft within the latter. As pointed 110 out above both stationary contacts 19 and 20 are also mounted upon the body section 5 and it will therefore be clear that all of the parts of the switch mechanism being thus mounted on one section of the body can all 115 be assembled in exact and proper relation on said section before the latter is secured to the opposite section 4 which is a feature of practical importance because it insures the parts occupying proper relative positions 120 after assembly.

1. 'A device of the character described comprising-a circuit-controlling switch including a shaft and a radially resilient con- 125 tact; a ratchet wheel connected with said shaft so that the wheel and shaft rotate together; a pull chain extending around said ratchet wheel and in engagement with the teeth of said wheel whenthe chain is moved 130 in one direction; a retracting spring operatively connected with the inner end of said chain; and means for preventing reverse movement of the wheel and shaft during the movement of the chain under the influence of said spring.

2. A device of the character described comprising a body formed with an interior chamber; a circuit-controlling switch including a shaft extending into said chamber; a ratchet wheel within said chamber and loosely mounted on said shaft but connected to rotate therewith; a pull chain extending around said wheel and engaging the latter; a chain-supporting member within said chamber loosely mounted on said shaft and having the inner end of said chain connected therewith; and a spring in said chamber con'. nected at one end with said member and at its opposite end to said body, walls of said chamber serving to hold said wheel and member against movement endwise on said shaft.

3.1K device of the character described comprising a body in two sections; two fixed contacts mounted on one of said sections; a shaft rotatably mounted on said section and extending longitudinally of the device; a radially resilient bridge contact carried by said shaft and cooperating with said fixed contacts; a pull chain extending crosswise of the device; and means carried by said shaft and connected with said chain through which said shaft is actuated step by ste a through movement of the chain.

4. i device of the character described comprising a circuit-controlling switch including a body; a shaft; a radially resilient contact carried by said shaft; a ratchet wheel connected with said shaft so that the wheel and shaft rotate together; a pull chain extending around said ratchet wheel and in engagement therewith when the chain is moved in one direction; a chain-supporting member loosely mounted on said shaft along side said wheel and having the inner end of said chain fastened thereto; a spring having one end thereof connected with said member and the other end connected with said body; and means for preventing reverse movement of the wheel and shaft when said member and chain are moved reversely by the spring.

5. A device of the character described comprising a body; two fixed contacts mounted on said body; a shaft extending longitudinally of the device; a bridge member carried by said shaft and cooperating with the fixed contacts, said bridge member comprising a pair of radially resilient contact arms adapted near their outer ends to engage said fixed contacts and connected at their inner ends by a cross-bar that is connected near its middle to said shaft; a ratchet wheel mounted on and connected with said shaft so that said wheel and shaft rotate together; a pull chain extending around and in engagement with said wheel when the chain is moved in one direction; a chain supporting member loosely mounted on said shaft alongside of said wheel and having the inner end of said chain connected therewith, and a spring connected at one end with said member and at its opposite end to said body.

RALPH A. SCHOENBERG. 

